So why the fuck did @TeamYouTube remove the full screen button anyways? You can still get it to go full screen by double clicking, and exiting after that will result in the fullscreen button being shown again... but why not just show the button to begin with?
I still got it on my part with Linux Lite and Mozilla Firefox. Must be Shitdows 10 and the new gig about Microsoft forcing you to use Edge and intentionally causing fuck ups for Mozilla.